Gardena 1740-20

Gardena Classic 4000/2 Rain Water Tank Pump User Manual

Model: 1740-20

Introduction

Thank you for choosing the Gardena Classic 4000/2 Rain Water Tank Pump. This manual provides essential information for the safe and efficient operation, installation, and maintenance of your pump. Please read these instructions carefully before first use and keep them for future reference.

The Gardena Classic 4000/2 is designed for pumping clean rain water from tanks and barrels for garden irrigation. It offers a maximum flow rate of 4000 liters per hour and a maximum lifting height of 20 meters.

Gardena Classic 4000/2 Rain Water Tank Pump
The Gardena Classic 4000/2 Rain Water Tank Pump, ready for use.

Important Safety Instructions

Always observe the following safety precautions to prevent injury or damage.

Package Contents

Please check that all items are present and undamaged upon unpacking:

Diagram of Gardena Classic 4000/2 Rain Water Tank Pump components
Diagram illustrating the main components of the pump.

Setup

1. Initial Assembly and Placement

  1. Attach the telescopic connection pipe to the pump outlet. Ensure it is securely fastened.
  2. Lower the pump into the rain water tank or barrel. The pump must be fully submerged in water.
  3. Adjust the height of the telescopic pipe so that the regulating and shut-off valve is easily accessible above the water level.
Person installing Gardena pump in a rain barrel
Proper placement of the pump in a rain barrel, ensuring full submersion.

2. Electrical Connection

  1. Ensure your mains power supply matches the voltage specified on the pump's rating plate (18 Volts).
  2. Connect the power cable to a suitable, outdoor-rated power outlet that is protected by an RCD.
  3. Note: Some units may be supplied with a European plug. An appropriate adapter or plug replacement by a qualified electrician may be necessary for your region.
Hands connecting the power cable of the Gardena pump
Connecting the power cable to the pump's housing.

Operating Instructions

1. Starting the Pump

  1. Ensure the pump is fully submerged and the float switch is free to move.
  2. Plug the pump into the power outlet. The pump will start automatically once the water level is sufficient to activate the float switch.
  3. Connect your garden hose or irrigation system to the regulating and shut-off valve on the telescopic pipe.
Hands connecting a garden hose to the pump's outlet valve
Connecting a standard garden hose to the pump's outlet valve for irrigation.

2. Adjusting Water Flow

The regulating and shut-off valve on the telescopic pipe allows you to control the water flow. Turn the valve to increase or decrease the flow as needed for your irrigation tasks.

3. Automatic Operation (Float Switch)

The integrated float switch automatically turns the pump on when the water level rises and off when it falls below a certain point, preventing dry running. Ensure the float switch can move freely and is not obstructed by the tank walls or other objects.

Maintenance

Regular maintenance ensures the longevity and optimal performance of your pump.

1. Cleaning the Filter

The pump is equipped with an integrated filter to prevent debris from entering. If the pump's performance decreases, the filter may need cleaning.

  1. Disconnect the pump from the power supply.
  2. Remove the pump from the water tank.
  3. Unscrew or detach the filter base at the bottom of the pump.
  4. Clean the filter thoroughly under running water. Remove any accumulated debris.
  5. Reattach the filter base securely before placing the pump back into operation.
Hand removing the filter base from the bottom of the Gardena pump
Removing the filter base for routine cleaning.

2. Winter Storage

Before the first frost, or if the pump will not be used for an extended period, prepare it for storage:

Troubleshooting

If you encounter issues with your pump, refer to the table below for common problems and solutions.

ProblemPossible CauseSolution
Pump does not start.No power supply.Check power connection, fuse, and RCD.
Float switch not activated (water level too low).Ensure sufficient water level in the tank. Check float switch for obstructions.
Motor protection activated (overheating).Disconnect from power, allow pump to cool down. Check for blockages.
Low flow rate or no water delivery.Filter is clogged.Clean the filter as described in the Maintenance section.
Hose or pipe is kinked or blocked.Check all connections and hoses for obstructions.
Air in the pump.Ensure pump is fully submerged and allow it to run for a short period to expel air.
Pump runs continuously.Float switch stuck in 'on' position.Check float switch for free movement and obstructions.
Leak in the discharge line.Inspect hoses and connections for leaks.

Specifications

Warranty and Support

Gardena products are manufactured to high quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Gardena website.

For technical support, spare parts, or service inquiries, please contact Gardena customer service. Contact information can typically be found on the Gardena website or in your product packaging.

Online Resources: For additional information and support, visit the official Gardena Store on Amazon.

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